Liquid-dispenser.



S. L. LONG.

LIQUID DlSPENSER.

APPLICATION FILED wus, |913.

l, 1 86,2 1 3 Patented J une `6, 1916.

W ITN ESSES f L ATTOR Y UNITED STATES PATENT OFFICE.`

SIDNEY L. LONG, F MINNEAPOLIS, MINNESOTA, ASSIG-NOR T0 LONG MAILING- MACHINE COMPANY, OF MINNEAPOLIS,

MINNESOTA, A CORPORATION.

LIQUrn-DrsrnNsna.

Specification of Letters Patent.

Patented June 6, `1916.

Application led July 9, 1913. Serial N o. 778,230.

To all whom it may concern Be it kno-wn that I, SIDNEY L. LONG, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Liquid- Dispensers, of which the following is a specification.

My invention relates to liquid dispensers and has for its object to provide a mechanism whereby a drop of water or other liquid such as may be desired will be automatically ejected from a liquid receptacle at an accurately timed moment in the operation of any machine to which the liquid dispenser may be applied.

The full objects and advantages of my invention will appear in connection with the detailed description thereof and are particularly pointed out in the claims.

In the drawings, illustrating the application of my invention in one form,*Fig ure 1 is a side elevationview of an apparatus embddying my invention. Fig. 2 is an end elevation view of the same.` Fig. 3 is a side elevation of my apparatus viewed from the opposite side from Fig. 1. Fig. 4 is a top plan view of the parts shown in Fig. 3. Fig. 5 is a sectional plan on line 5 5 of Fig. l. Fig. 6 is a sectional elevation on line 6k6 of Fig. 2.

A frame block 10 forms the body of my liquid dispenser which may be secured to any machine in connection with which the dispenser might be used by means of screws passing through apertures 11 formed in said frame block. The frame block is provided with a horizontal bore or hole 12 preferably of circular form extending entirely through the same, and from said bore adjacent one end thereof extends an aperture 13 which is connected with a dispensing pipe 14 adjacent aperture 13 and threaded into the bore 12 is a hollow cap 15 closed at the outer and open at the inner end, said cap being connected by a pipe 16 with reservoir 17 containing the liquid to be dispensed. A piston 18 is adapted to close and slide within the bore 12, being normally held in engagement with the inner end of cap by a spiral spring 19 which has one end seated in a cavity 20 in said piston 18, the other end being seated within a cavity or bore 21 of a cap 22 threaded into bore 12. The cap 22 is provided with a finger piece 23 by means of which the same may be rotated and the tension of spring 19 thereby be adjusted. A smaller block 24 of rubber or equivalent resilient material is set within a cavity in the end ofpiston 18 and said block 24 i'sadapted to contact with the annular end surface of the cap '15. A secondary piston 25 of slightly less diameter than the bore of cavity 26 within cap piece 15 is carried by a stem 27 threaded into piston 18 so that piston 25 is normally positioned at the end of cavity 26 and just outside of the opening of pipe 16 thereinto. It is also to be noted that the piston 18 when held in contact with the end of cap 15 by spring 19 extends a Vlittle beyond the opening of aperture 13 into bore 12 so that said aperture 13 is normally closed by the side wall of piston 18.

At each side of bore 12 slots 28 and 29 extend longitudinally thereof through the walls of frame block 10, and a pin secured in a transverse aperture in piston 18 has the ends thereof extending through said slots and outside of the side plane of frame block 10, as best shown in Fig. 1. The slots are of such length relative to piston 18 as to permit a sliding movement of piston'18 in bore 12 of suiiicient extent to uncover the opening of aperture 13 into bore 12 but not to uncover the slots 28 and 29. Upon a rock shaft 31 journaled in frame piece 10 below and parallel with thel pin 30 are secured a pair of arms 32 and 33 extending outside of the side walls of said framevpiece 10 and each having at the upper end thereof a yoke 34 loosely embracing the extended ends of pin 30. Rocking of shaft 31 will therefore cause arms 32 and 33 to slide piston 18 in bore 12 against the pressure of spring 19.

Extending at an angle to arm 33 and integrally connected therewith is an arm 35 which comes beneath a pin 36 on a slide 37 held in a groove or slot 38 formed in the side of frame piece 1() by means of a plate 39 secured to said frame piece 10 by screws 40, said plate 39 .overlapping the side of slide 37, as best shown in Fig. 4. A weight 41 is secured to slide 37 by means of screws 42. The slide 37 has an upwardly curved portion 43 overhanging a. bore 44 open at the top and extending downwardly into frame block 10. A spring 45 has one end secured to a stud or pin 46 extending through a wall of frame piece 10 and across bore 44 near the bottom thereof, the other end of spring 45 being connected to an eye-piece 47 carried removably by the portion 43 of slideJ 37. Both Weight 41 and spring 45 tend to move the slide 37 soas to cause the pin 86 thereon to engage arm 35 and rock shaft 31, but the force normally exerted by weight 41 and spring 45 is not so great as the force of spring 19, so that said spring 19 in opposition to the force of Weight 41 and spring 45 will normally hold the piston 18 and block 24 in the end there of in contact with the annular end of cap 15. The slide 37 extends for some distance below frame piece 10 and is provided at its lower end with a cam head 48 which is adapted to be engaged by a cam 49 on a shaft 50 mounted on the frame of and driven by any machine (not shown) With which my liquid dispenser may be used, as, for example, an envelop stamping machine such as that shown in my co-pending application, Serial Number 627,732, filed May 17, 1911. 1n a machine of such type it is desirable that a small drop of Water of predetermined quantity shall be dispensed to the moistening rolls at stated intervals and lthat such a quantity of Water and no more shall always be so dispensed. The shaft 5() will, of course, be driven in correlation with the mechanism of the machine so that cam 49 thereon will engage cam head 48 at the proper time in the cycle of operations of the machine for so dispensing` such predetermined quantity of liquid. Then cam 49 engages cam head 48 the slide 37 is raised against the force of Weight 41 and spring 45, withdrawing pin 36 from engagement with arm 35. lWhen cam 49 passes off of cam head 48 the slide 37 is instantly and rapidly actuated by Weight 41 and spring 45 to descend causing pin 36 to strike arm 35 thereby rocking shaft 31 and arms 32 and 33 thereon by which, through pin 30 in forks 34, the piston 18 is given a quick backward movement in bore 12 against the pressure of spring 19. This movement is sufficient to carry said piston 18 from above the opening of aperture 13 into bore 12 permitting liquid to enter said aperture from cavity 26, but 19 instantly thereafter returns piston 18 to initial position closing the' aperture 13, this rapid opening and closing permitting a drop of liquid to pass into the pipe 14 to be dispensed at the point required. According to the adjustment of the tension of spring 19 by means o-f cap 22 the duration of communication between aperture 13 and cavity 26 Will be greater or less resulting in a larger or smaller drop of liquid being dispensed. as the requirements of the machine and the work done thereby may necessitate. The secondary piston 25 has an important function in the dispensing of the drop of liquid'delivered to pipe 14 as the quick movement of this piston in the cavity 26 gives a sudden impulse to the drop which passes to pipe 14 and insures its immediate delivery at the point desired. The piston 25 is made smaller in diameter than the diameter of chamber 26, so thatthe piston will not exercise a retarding effect upon the slide 18, especially on the return or closing movement of said slide, which must be very rapid, and also so that it Will not tend to force out too much liquid into discharge opening 18 during the momentary period when said opening is uncovered by slide 18. The piston 25 merely gives an impulse to the liquid in chamber 26, Which insures the breakage of the surface tension of the small drop of Water passing into passageway 13 during the momentary period that the said passageway is open to receive the drop of WaterI While either a spring such as 45 or a Weight such as 41 might actuate the slide 87 so as to operate piston 18 I have found that by far the best results are obtained by the union of these two forces for actuation of the slide as such a union is essential to eli'ect a suiiiciently rapid and balanced stroke. This is due to the fact that the spring at the moment of release has its maximum efficiency thereafter decreasing in force to the end of the stroke while the weight at the. moment of release has its minimum el'licicncy, accelerating under the iniluence of gravity to the end of the stroke. Since rapidity of movement of slide 87 is essential for the best results, it will be seen that the combination of the spring and the weight provides ahighly efiicient organism for accomplishing that result.

I claim:

1. A liquid dispenser comprising a casing having a chamber for said liquid, a dispensing pipe adapted to communicate With said chamber, a valve, a Weight, a striking member carried by the Weight, means acting periodically for lifting and releasing the Weight, and means actuated by said striking member during the descent of the Weight when the same is released for momentarily opening and closing said valve.

2. A liquid dispenser comprising a casing having a chamber for said liquid, a dispensing pipe adapted to communicate with said chamber, a valve, a. vertically movable Weighted slide, means acting periodically for lifting and releasing the slide, and means acted upon by the slide when released for momentarily opening and closing said valve.

3. A liquid dispenser comprising a casing forming a chamber for said liquid, a. dispensing pipe adapted to communicate With said chamber, a valve normally closing said communication, a vertically movable Weighted slide, a spring connected with said slide sof and acting in conjunction with gravity to hold the slide in its lowered position, means acting periodically to lift the slide and distend the spring and thereafter' release the slide, and means acted upon by said slide when released for momentarily opening and closing said valve.

4. A liquid dispenser comprising a frame piece, means connected with said frame piece forming a chamber for said liquid, a dispensing pipe having connection with said frame piece and adapted to communicate with said chamber, a sliding valve normally closing said communication, means for moving and returning said valve to eifect momentary opening of such communication, and a piston in the chamber connected with the valve for giving an impulse to the liquid when the dispensing pipe is open.

5. A liquid dispenser comprising an elongated tubular chamber, a liquid supply pipe having communication with one end of said chamber', a dispensing pipe adapted to communicate with the other end of said chamber, a sliding valve normally shuttingoff communication between the chamber and dispensing pipe, a piston carried by said valve of less diameter than the chamber and positioned beyond the opening of the supply pipe thereinto, and means to move and return the sliding valve for opening momentary communication between the chamber and dispensing pipe.

G. A liquid dispenser comprising a frame piece, means connected with said frame piece forming a chamber for said liquid, a dispensing pipe having connection with said frame piece and adapted to communicate with said chamber, a sliding valve spring held in position to close said communication, a rock shaft and connections therefrom to the valvefor sliding the valve, a slide on the frame piece, and means to give the slide a sudden movement to cause it to operate the rock shaft and move the valve.

7 A liquid dispenser comprising a frame piece, means connected with said frame piece forming a chamber for said liquid, a dispensing pipe having connection with said rame piece and adapted to communicate with said chamber, a sliding valve spring held in position to close said communication, a. rock shaft and connections therefrom to the valve for sliding the valve, a vertically movable slide on the frame piece, an arm on the rock shaft adapted to be engaged by said slide, a weight on the slide, and means to lift and release the slide to cause the same to strike such arm a sudden blow and give the valve a quick movement.

8. A liquid dispenser comprising a frame piece, means connected with said frame piece forming a chamber for said liquid, a dispensing pipe having connection with said frame piece and adapted to communicate with said chamber, a sliding Valve spring held in position to close said communication, a rock shaft and connections therefrom to the valve for sliding the valve, a vertically movable slide on the frame piece, an arm on the rock shaft adapted to be engaged by said slide, a weight on the slide, a spring having connection with the slide, and means to move the slide to lift the weigh-t and eX- tend the spring and thereafter release the slide, whereby the weight and spring will cause the slide to strike the arm a sudden blow and give the valve a quick movement.

9. A liquid dispenser comprising a cylindrical casing forming a chamber for said liquid, said casing being provided with an annular shoulder, a dispensing pipe adapted tocommunicate with said chamber at one side of said shoulder, a piston valve slidable in said chamber at the same side of said shoulder, said piston having inset in the end adjacent said shoulder a block of rubber or equivalent material, a spring normally holding said piston so that said blockof rubber contacts with the shoulder and the opening from the chamber to the dispensing pipe is closed, andY means acting periodically to slide said piston and compress the spring and immediately thereafter to release the piston to permit the spring to return the same to normal position for momentarily opening and closing communication between the dispensing pipe and the chamber.

10. A liquid dispenser comprising a frame piece formed with a tubular bore through the same and having a pair of slots extending through the walls thereof and communicating longitudinally with said bore, means closing the ends of the bore forming at one end a chamber for liquid opening into the bore, a dispensing pipe having communication with the bore adjacent the end of said chamber, a piston valve slidable in said bore and spring held in position normally to close said communication, trunnions extending from said piston through said slots, a. rock shaft having yoke arms engaging said trunnions, 'an angle arm on said rock shaft, a slide havinga projection adapted to engage said arm, means to move and release the slide, and means operative upon the slide when released to cause the projectionv on the same to strike said angle arm a sudden blow and cause the trunnion arms to give the valve a quick movement.

11. A liquid dispenser comprising a frame piece formed with a tubular bore through the same and having a pair of slots extending through the walls thereof and communicating longitudinally with said bore, means closing the ends of the bore forming at one end a chamber for liquid opening into the bore, a dispensing pipe having communication with the bore adjacent the end of said chamber, a piston valve slidable in said bore and spring held in position normally to Close said communication, trunnions extending from said piston through said slots7 a rook shaft having yoke arms engaging said trunnions, an angle erm on said rook shaft, e slide having e projection adapted to engage said arm, means to move and release the slide, and combined gravity and spring means operative upon the slide slide to strike said angle arm a sudden blow and Cause the tiunnion arms to give the valve a quick movement.

In testimony whereof I ailiX my signature in presence of two witnesses.

l SIDNEY L. LONG. Witnesses:

ROBERT W. Mum,

H. A. BOWMAN.

l0 when released to cause the projection on the Copies of this patent may be obtained for ve cents caen, by addressing 'che "Commissioner of Patents, Washington, D. C. 

